/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime(time, cFormat) {
    if (arguments.length === 0 || !time) {
      return null
    }
    const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
    let date
    if (typeof time === 'object') {
      date = time
    } else {
      if ((typeof time === 'string')) {
        if ((/^[0-9]+$/.test(time))) {
          // support "1548221490638"
          time = parseInt(time)
        } else {
          // support safari
          // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
          time = time.replace(new RegExp(/-/gm), '/')
        }
      }
  
      if ((typeof time === 'number') && (time.toString().length === 10)) {
        time = time * 1000
      }
      date = new Date(time)
    }
    const formatObj = {
      y: date.getFullYear(),
      m: date.getMonth() + 1,
      d: date.getDate(),
      h: date.getHours(),
      i: date.getMinutes(),
      s: date.getSeconds(),
      a: date.getDay()
    }
    const time_str = format.replace(/{([ymdhisa])+}/g, (result, key) => {
      const value = formatObj[key]
      // Note: getDay() returns 0 on Sunday
      if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }
      return value.toString().padStart(2, '0')
    })
    return time_str
  }
  
  /**
   * @param {number} time
   * @param {string} option
   * @returns {string}
   */
  export function formatTime(time, option) {
    if (('' + time).length === 10) {
      time = parseInt(time) * 1000
    } else {
      time = +time
    }
    const d = new Date(time)
    const now = Date.now()
  
    const diff = (now - d) / 1000
  
    if (diff < 30) {
      return '刚刚'
    } else if (diff < 3600) {
      // less 1 hour
      return Math.ceil(diff / 60) + '分钟前'
    } else if (diff < 3600 * 24) {
      return Math.ceil(diff / 3600) + '小时前'
    } else if (diff < 3600 * 24 * 2) {
      return '1天前'
    }
    if (option) {
      return parseTime(time, option)
    } else {
      return (
        d.getMonth() +
        1 +
        '月' +
        d.getDate() +
        '日' +
        d.getHours() +
        '时' +
        d.getMinutes() +
        '分'
      )
    }
  }
  
  /**
   * @param {string} url
   * @returns {Object}
   */
  export function getQueryObject(url) {
    url = url == null ? window.location.href : url
    const search = url.substring(url.lastIndexOf('?') + 1)
    const obj = {}
    const reg = /([^?&=]+)=([^?&=]*)/g
    search.replace(reg, (rs, $1, $2) => {
      const name = decodeURIComponent($1)
      let val = decodeURIComponent($2)
      val = String(val)
      obj[name] = val
      return rs
    })
    return obj
  }
  
  /**
   * @param {string} input value
   * @returns {number} output value
   */
  export function byteLength(str) {
    // returns the byte length of an utf8 string
    let s = str.length
    for (var i = str.length - 1; i >= 0; i--) {
      const code = str.charCodeAt(i)
      if (code > 0x7f && code <= 0x7ff) s++
      else if (code > 0x7ff && code <= 0xffff) s += 2
      if (code >= 0xDC00 && code <= 0xDFFF) i--
    }
    return s
  }
  
  /**
   * @param {Array} actual
   * @returns {Array}
   */
  export function cleanArray(actual) {
    const newArray = []
    for (let i = 0; i < actual.length; i++) {
      if (actual[i]) {
        newArray.push(actual[i])
      }
    }
    return newArray
  }
  
  /**
   * @param {Object} json
   * @returns {Array}
   */
  export function param(json) {
    if (!json) return ''
    return cleanArray(
      Object.keys(json).map(key => {
        if (json[key] === undefined) return ''
        return encodeURIComponent(key) + '=' + encodeURIComponent(json[key])
      })
    ).join('&')
  }
  
  /**
   * @param {string} url
   * @returns {Object}
   */
  export function param2Obj(url) {
    const search = decodeURIComponent(url.split('?')[1]).replace(/\+/g, ' ')
    if (!search) {
      return {}
    }
    const obj = {}
    const searchArr = search.split('&')
    searchArr.forEach(v => {
      const index = v.indexOf('=')
      if (index !== -1) {
        const name = v.substring(0, index)
        const val = v.substring(index + 1, v.length)
        obj[name] = val
      }
    })
    return obj
  }
  
  /**
   * @param {string} val
   * @returns {string}
   */
  export function html2Text(val) {
    const div = document.createElement('div')
    div.innerHTML = val
    return div.textContent || div.innerText
  }
  
  /**
   * Merges two objects, giving the last one precedence
   * @param {Object} target
   * @param {(Object|Array)} source
   * @returns {Object}
   */
  export function objectMerge(target, source) {
    if (typeof target !== 'object') {
      target = {}
    }
    if (Array.isArray(source)) {
      return source.slice()
    }
    Object.keys(source).forEach(property => {
      const sourceProperty = source[property]
      if (typeof sourceProperty === 'object') {
        target[property] = objectMerge(target[property], sourceProperty)
      } else {
        target[property] = sourceProperty
      }
    })
    return target
  }
  
  /**
   * @param {HTMLElement} element
   * @param {string} className
   */
  export function toggleClass(element, className) {
    if (!element || !className) {
      return
    }
    let classString = element.className
    const nameIndex = classString.indexOf(className)
    if (nameIndex === -1) {
      classString += '' + className
    } else {
      classString =
        classString.substr(0, nameIndex) +
        classString.substr(nameIndex + className.length)
    }
    element.className = classString
  }
  
  /**
   * @param {string} type
   * @returns {Date}
   */
  export function getTime(type) {
    if (type === 'start') {
      return new Date().getTime() - 3600 * 1000 * 24 * 90
    } else {
      return new Date(new Date().toDateString())
    }
  }
  
  /**
   * @param {Function} func
   * @param {number} wait
   * @param {boolean} immediate
   * @return {*}
   */
  export function debounce(func, wait, immediate) {
    let timeout, args, context, timestamp, result
  
    const later = function() {
      // 据上一次触发时间间隔
      const last = +new Date() - timestamp
  
      // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
      if (last < wait && last > 0) {
        timeout = setTimeout(later, wait - last)
      } else {
        timeout = null
        // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
        if (!immediate) {
          result = func.apply(context, args)
          if (!timeout) context = args = null
        }
      }
    }
  
    return function(...args) {
      context = this
      timestamp = +new Date()
      const callNow = immediate && !timeout
      // 如果延时不存在，重新设定延时
      if (!timeout) timeout = setTimeout(later, wait)
      if (callNow) {
        result = func.apply(context, args)
        context = args = null
      }
  
      return result
    }
  }
  
  /**
   * This is just a simple version of deep copy
   * Has a lot of edge cases bug
   * If you want to use a perfect deep copy, use lodash's _.cloneDeep
   * @param {Object} source
   * @returns {Object}
   */
  export function deepClone(source) {
    if (!source && typeof source !== 'object') {
      throw new Error('error arguments', 'deepClone')
    }
    const targetObj = source.constructor === Array ? [] : {}
    Object.keys(source).forEach(keys => {
      if (source[keys] && typeof source[keys] === 'object') {
        targetObj[keys] = deepClone(source[keys])
      } else {
        targetObj[keys] = source[keys]
      }
    })
    return targetObj
  }
  
  /**
   * @param {Array} arr
   * @returns {Array}
   */
  export function uniqueArr(arr) {
    return Array.from(new Set(arr))
  }
  
  /**
   * @returns {string}
   */
  export function createUniqueString() {
    const timestamp = +new Date() + ''
    const randomNum = parseInt((1 + Math.random()) * 65536) + ''
    return (+(randomNum + timestamp)).toString(32)
  }
  
  /**
   * Check if an element has a class
   * @param {HTMLElement} elm
   * @param {string} cls
   * @returns {boolean}
   */
  export function hasClass(ele, cls) {
    return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'))
  }
  
  /**
   * Add class to element
   * @param {HTMLElement} elm
   * @param {string} cls
   */
  export function addClass(ele, cls) {
    if (!hasClass(ele, cls)) ele.className += ' ' + cls
  }
  
  /**
   * Remove class from element
   * @param {HTMLElement} elm
   * @param {string} cls
   */
  export function removeClass(ele, cls) {
    if (hasClass(ele, cls)) {
      const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)')
      ele.className = ele.className.replace(reg, ' ')
    }
  }
  